From the Rolls-Royce experimental archive: a quarter of a million communications from Rolls-Royce, 1906 to 1960's. Documents from the Sir Henry Royce Memorial Foundation (SHRMF).
Performance and specification comparison between Vauxhall 14 and Rover 16 models.
| Identifier | ExFiles\Box 128\3\ scan0061 | |
| Date | 1st December 1939 | |
| 1104 NRC.{N. R. Chandler}II.12.39. Vauxhall 14 and Rover 16. Attached are published performance and specification figures for the 1935 & 1939 Vauxhall and 1939 Rover 16. from which data I have worked out other factors for comparison. It will be noted that although the specification features of the 1935 & 1939 Vauxhalls are practically identical, the former is stated to have a considerably faster accel. from 20 to 40, and I do not know why this is, as the litres per ton mile, which includes axle ratio, tyre size and weight, are almost identical. Comparing the 1939 models, I would make the following observations.- The Rover is a considerably larger and heavier car, although there is but little difference in the passenger space available, but the engine capacity in relation to the weight is less, so that at the same BMEP, the accel. is not so good. In comparing the accel. on top, it will be noted that the accel. of the Vauxhall is better than that of the Rover in almost exactly the ratio of the litres per ton mile, and this suggests that the effective BMEP of the two engines is about the same, and that either the BMEP of the Vauxhall 1935 is higher than that of the 1939, or else there was an error in the observation, or possibly that engine had exceptionally good distribution. Assuming that there is not much difference in the BMEP or the consumption per HP hour of the two engines, the fact remains that the Vauxhall is only 78% of the weight of the Rover, and has nearly 14% more litres per ton mile, so that a lower consumption and more lively performance may be anticipated. N.R.C. | ||